GNU PSPP

GNU PSPP is a program for statistical analysis of sampled data. It is a
Free replacement for the proprietary program SPSS, and appears very
similar to it with a few exceptions.

The most important of these exceptions are, that there are no
“time bombs”;
your copy of PSPP will not “expire” or deliberately stop working
in the future.
Neither are there any artificial limits on
the number of cases or variables which you can use.
There are no additional packages to purchase in order to get
“advanced” functions;
all functionality that PSPP currently supports is in the core package.

PSPP is a stable and reliable application.
It can perform descriptive statistics, T-tests, anova, linear and logistic regression,
measures of association, cluster analysis, reliability and factor analysis,
non-parametric tests and more.
Its backend is designed to perform its analyses as fast as possible, regardless
of the size of the input data.
You can use PSPP with its graphical interface or the more traditional
syntax commands.

Documentation

Documentation for
PSPP
is available online, as
is documentation for most GNU software. You may
also find more information about
PSPP
by running
info pspp
or
man pspp,
or by looking at
/usr/share/doc/pspp/,
/usr/local/doc/pspp/,
or similar directories on your system. A brief summary is available by
running pspp --help.

A developer's manual is also available in
various formats. Developers of software designed to interoperate
with PSPP or SPSS will find this manual's appendices particularly
valuable, because they specify the data file formats in great
detail.

Further information

For further information, please browse our list of
frequently asked questions to see if
your issue is mentioned there.
If it is not, you might also want to peruse the archives of our mailing list,
pspp-users; the
issue may have been discussed there.
Failing that, you are welcome to
subscribe
to the list, and send a question of your own.

If you believe you have found a bug in PSPP, please report it either
by sending a message to the mailing list
bug-gnu-pspp
or by using the
bug tracker.

Announcements about PSPP are made on
pspp-announce
as well as (in common with most other GNU software)
info-gnu.

Getting involved

Development of PSPP
and GNU in general, is a volunteer effort, and you can contribute. For
information, please read How to help GNU. If you'd
like to get involved, it's a good idea to join the discussion mailing
list (see above).

To translate PSPP's messages into other languages, please see the Translation Project
page for PSPP.
If you have a new translation of the message strings,
or updates to the existing strings, please have the changes made in this
repository. Only translations from this site will be incorporated into
PSPP.
For more information, see the Translation
Project.

Maintainer

PSPP is currently being maintained by Ben Pfaff.
Please use the mailing lists for contact.

Licensing

PSPP
is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.